let ageGroup = age > 36 ? '王萍' : '寸寸隽';

//数组去重
const numbers = [1, 1, 2, 4, 6, 8, 36, 66, 64];
const uniqueNumbers = [...new Set(numbers)];

//交换x,y的值
let x = 1, y = 2;
[x,y] = [y,x];

let a1 = [1,2,3];
let a2 = [4,5,6];
let newArray = [...a1,...a2];
[newArray,36,64];

Math.floor(5.25);
~~5.26